<?php
session_start();

function img(){

	$im=imagecreate(50,20);

	$white=imagecolorallocate($im,255,255,255);

	$black=imagecolorallocate($im,0,0,0);

	imagerectangle($im,0,0,49,19,$black);

	$temp=0;

	$temp3="";

	$_SESSION["img"] = null;

	for ($i=1;$i<5;$i++){

		$temp1=rand(0,9);

		$temp3=$temp3.strval($temp1);

		$color1=rand(0,255);

		$color2=rand(0,255);

		$color3=rand(0,255);

		$color=imagecolorallocate($im,$color1,$color2,$color3);

		imagechar($im,16,5+$temp,2,$temp1,$color);

		$temp=$temp+10;

		for ($j=0;$j<15;$j++){

			$point_x=rand(2,48);

			$point_y=rand(2,18);

			$color=imagecolorallocate($im,$color1,$color2,$color3);

			imagesetpixel($im,$point_x,$point_y,$color);

		}

	}

	$_SESSION["img"]=$temp3;

	imagegif($im);

	imagedestory($im);

}

img();
?>